8897971021839 has 12 divisors (see below), whose sum is σ = 12900051472672. Its totient is φ = 5910091452000.

The previous prime is 8897971021801. The next prime is 8897971021859. The reversal of 8897971021839 is 9381201797988.

It is not a de Polignac number, because 8897971021839 - 2¹³ = 8897971013647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8897971021859) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1824099862 + ... + 1824104739.

Almost surely, 2^{8897971021839} is an apocalyptic number.

8897971021839 is a deficient number, since it is larger than the sum of its proper divisors (4002080450833).

8897971021839 is a wasteful number, since it uses less digits than its factorization.

8897971021839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3648204878 (or 3648204875 counting only the distinct ones).

The product of its (nonzero) digits is 109734912, while the sum is 72.

The spelling of 8897971021839 in words is "eight trillion, eight hundred ninety-seven billion, nine hundred seventy-one million, twenty-one thousand, eight hundred thirty-nine".